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Brain
Brain


Hypothalamus
Hypothalamus


Cause of headaches
Cause of headaches


Pain of cluster headache
Pain of cluster headache


Definition:

A cluster headache is one-sided head pain that may involve tearing of the eyes and a stuffy nose. The headaches occur repeatedly every day at the same time for several weeks and then go away.

See also:



Alternative Names:

Histamine headache; Headache - histamine; Migrainous neuralgia; Headache - cluster



Causes, incidence, and risk factors:

Cluster headaches are a fairly common form of chronic , repeated headaches. They are more common in men than women. The headaches can occur at any age but are most common in adolescence and middle age.

Scientists do not know exactly what causes cluster headaches, but they appear to be related to the body's sudden release of histamine or serotonin . Family history may play a role.

Some people who have cluster headaches are heavy smokers. Alcohol use may trigger attacks. Bright light (glare), stress, or certain foods may trigger an attack.



Symptoms:

A cluster headache begins as a severe, sudden headache. The headache most commonly strikes 2 to 3 hours after falling asleep, usually during the dreaming (rapid eye movement, or REM) phase.

The pain occurs on one side of the head. It may be described as:

  • Burning
  • Sharp
  • Steady

The pain may occur in and around one eye. It may:

  • Involve one side of the face from neck to temples
  • Quickly gets worse, peaking within 5 to 10 minutes

The strongest pain may last 30 minutes to 2 hours.

The eye and nose on the same side of the head pain may also be affected. Symptoms can include:

  • Swelling under or around the eye (may affect both eyes)
  • Excessive tearing
  • Red eye
  • Rhinorrhea (runny nose) or one-sided stuffy nose (same side as the head pain)
  • Red, flushed face

Cluster headaches may occur daily for months, alternating with periods without headaches (episodic), or they can recur for a year or more without stopping (chronic).



Signs and tests:

Your health care provider can diagnosis this type of headache by performing a physical exam and asking questions about your symptoms and medical history.

If a physical exam is done during an attack, the exam will reveal Horner syndrome (one-sided eyelid drooping or a small pupil). These symptoms will not be present at other times. No other neurological changes will be seen.

Tests, such as an MRI of the head, may be needed to rule out other causes for the headaches.



Treatment:

Treatment does not cure cluster headaches. The goal of treatment is to relieve symptoms. The headaches may go away on their own, or you may need treatment to prevent them.

Smoking, alcohol use, specific foods, and other factors that seem to trigger cluster headaches should be avoided. A headache diary can help you identify your headache triggers. When you get a headache, write down the day and time the pain began. The diary should include notes about what you ate and drank in the last 24 hours, how much you slept and when, and what was going on in your life immediately before the pain started. For example, were you under any unusual stress? Also include information about how long the headache lasted, and what made it stop.

Treatment for cluster headaches involves:

  • Methods to treat the pain when it happens
  • Medicines to prevent the headaches

Your doctor may recommend the following treatments for when the headaches occurs:

  • Several weeks of anti-inflammatory (steroid) medicines such as prednisone -- starting with a high dose, then gradually decreased
  • Breathing in 100% (pure) oxygen -- often relieves cluster headache for some people, particularly for frequent cluster headaches that occur at night

A combination of medicines may be needed to control headache symptoms. Because each person responds differently to medicine, your doctor may have you try several medications before deciding which works best for you.

Painkillers do not usually relieve the pain from cluster headaches. Generally, they take too long to work.

Medicines for preventing cluster headaches may include:

  • Ergot preparations
  • Methysergide maleate

These drugs may have severe side effects. Patients should call their doctor if they have chest pain, numbness or tingling in the fingers or toes, changes in heart rate, or any other unusual symptoms while taking these medicines.

The following medications may also be used to treat or prevent headache symptoms:

  • Antihistamines
  • Indomethacin
  • Lithium carbonate
  • Calcium channel blockers
  • Propranolol
  • Amitriptyline
  • Verapamil
  • Cyproheptadine

In rare cases, surgery on certain nerve cells near the brain may be recommended if medications do not work.



Support Groups:



Expectations (prognosis):

Cluster headaches are not life-threatening and usually cause no permanent structural changes. However, they are chronic and may be painful enough to interfere with work or lifestyle. Occasionally, the pain may be so severe that some people may consider self harm. Side effects of medications or surgery may be severe.



Complications:
  • Headaches that interfere with daily activities
  • Horner syndrome
  • Side effects of medications
  • Complications due to surgery to treat the headaches, including:
    • Permanent muscle weakness in the face or head
    • Decreased sensation in parts of the face or head


Calling your health care provider:

Call for an appointment with your health care provider if cluster headaches do not respond to treatment, if headaches disturb sleep, if they happen whenever you are active, or are accompanied by other symptoms.

Emergency symptoms include drowsiness, vision changes, changes in movement or sensation, seizures , changes in alertness, and nausea or vomiting.



Prevention:

If prone to cluster headache, stop smoking. Alcohol use and any foods that are associated with cluster headache may need to be avoided. Medications may prevent cluster headaches in some cases.



References:

Silberstein SD, Young WB. Headache and facial pain. In: Goetz CG. Textbook of Clinical Neurology. 3rd ed. St. Louis, Mo: WB Saunders; 2007: chap. 53.




Review Date: 7/22/2009
Reviewed By: A.D.A.M. Editorial Team: David Zieve, MD, MHA, Greg Juhn, MTPW, David R. Eltz. Previously reviewed by Daniel B. Hoch, PhD, MD, Assistant Professor of Neurology, Harvard Medical School, Department of Neurology, Massachusetts General Hospital (7/22/2009).

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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789 Central Avenue, Dover, NH 03820
Phone: (603) 742-5252
Toll free: 1 (877) 201-7100